The calculated distance (air line) between Saint-Julien-en-Genevois and Strasbourg is approximately 186 miles respectively 299 kilometers.
By car or train, the actual journey to Strasbourg is certainly longer, as only the direct route (as the crow flies) between Saint-Julien-en-Genevois and Strasbourg has been calculated here.
Air line (approximately)
299 kilometers
161 nautical miles